Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee13511a02a7f12f…

MALICIOUS

PDF

39.7 KB Created: 2020-11-06 14:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d65b3a6cd518b4862f4af0dacabee814 SHA-1: 2f12daf3b3d084268944080d78ad2a3d08ac4f0b SHA-256: ee13511a02a7f12fb15159e727f5137c5c4894c12179f6084c657fee46cf4102
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/strik?keyword=official+rules+of+go+fish+card+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f879fbcd73cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f96ee26854a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8a8bb4cc2cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f88d0b20e1ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f8d11eb96a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8be5cccd443.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/7113620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3931/1260/files/kutabesememalasej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfc7154-f8ab-44ee-92f0-ad8313d56f9f/kizewimafuguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d3f825-cabc-446e-96e1-282123f0da63/juz_30_metode_ummi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74d03de-181a-48c2-a626-f3389ba0cc95/rasajodori.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0F 5464 bytes
SHA-256: 9916ee5847a74249fc2bb36a28cd895d9b07f497ca85ad90926c24174a4460bc
font_01_sfnt_off00006f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F78 10072 bytes
SHA-256: 666c468b1691e08869efb576b1901bba1b6e6cc2f8f73995b888d30212d8d0af